Adjustment Procedure-2225 Service
EXTERNAL Z-AXIS AND PROBE ADJUST
Equipment Required (See Table
4-1):
Leveled Sine-Wave Generator (Item
2)
Dual-Input Coupler (Item
9)
Screwdriver (Item
5) 50-a
BNC Termination (Item
10)
504
BNC Coaxial Cable (Item
8)
1 OX
Probe (Provided with instrument)
INITIAL CONTROL SETTINGS
Vertical
Channel
1
POSITION Midrange
MODE CH
1
CH
1
VOLTSIDIV
1
V
CH
1
VOLTSIDIV Variable CAL detent
Magnification
Xl
(CAL
knob in)
CH
1
AC-GND-DC DC
Horizontal
POSITION (COARSE and FINE) Midrange
HORIZONTAL MODE
XI
SECJDIV
20
ms
SECIDIV Variable CAL detent
Trigger
SLOPE
LEVEL
MODE
HOLDOFF
SOURCE
COUPLING
Positive
(f)
Midrange
P-P AUTO
MIN
VERT MODE
DC
PROCEDURE STEPS
1.
Check External Z-Axis Operation
a.
Connect the leveled sine-wave generator
output via a
504
BNC coaxial cable, a
504
BNC
termination, and a dual-input coupler to the
CH
1
OR
X
and the
EXT
INPUT
OR
Z input connectors.
b. Set the generator to produce a five-division,
50-kHz signal.
c. CHECK-For noticeable intensity modulation.
The positive part of the sine wave should be of lower
intensity than the negative part.
d. Disconnect the test equipment from the
instrument.
2.
Check Probe Adjust Operation
a. SET:
CH
1
VOLTSIDIV
10
mV
SECJDIV
0.5
ms
Trigger
SOURCE CH
1
b. Connect the
1 OX
Probe to the CH
1
OR
X
input
connector and clip the probe tip to the PROBE
ADJUST terminal on the instrument front panel. If
necessary, adjust the probe compensation for a
flat-
topped square-wave display (see Probe instruction
manual).
c. CHECK-Display amplitude is
4.75
to
5.25
divisions.
d. Disconnect the probe from the instrument.
Scans
by
AR
TEK
MEDLQ
=>
REV
APR
1990
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